Internet network issue

Hi yashandeep,

Welcome to the Apple Community :-)

Wondering if you need to check with your Internet provider ?

Apple support have articles online that may help you:

If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network

https://support.apple.com/en-us/HT204051

Connect iPhone to the internet with iOS 14

WiFi / Hotspot / Cellular data network

https://support.apple.com/en-au/guide/iphone/iphd1cf4268/14.0/ios/14.0

 Check VPN (Virtual Private Network) and third-party software to help resolve network connectivity ihttps://help.apple.com/iphone/8/#/iph1b489c85f

If nothing has helped, you might want to try:

How to update to iOS 15 

https://support.apple.com/ios/update

Connect to the Internet on iPhone 8

https://help.apple.com/iphone/8/#/iphd1cf4268

Connect to Wi-Fi on iPhone 8

https://help.apple.com/iphone/8/#/iph1b489c85f

OR

There is a "Get support" link to Apple at top right on this discussion page.

Hope this helps :-)